Lefty Ultra Carbon XLR, 120mm On A 2011 Scalpel 80 Am I Insane??!!

I put an Ultra on my wife's Scalpel 100 and it's really nice. Could I do the same on my 2011 Scalpel 80? The 100 mm it came with isn't quite what I'm looking for. I couldn't find an A-C dimension for the fork but I guess it's unchanged at 490mm.

Anyway if there's anyone who's building a Flash hard tail who needs a Carbon Speed Ultra with three rides on it I'll trade ya for the 120.

I'm running 73 psi in the Lefty and 125 in the rear shock to get my sags in the low end of the range. I'm thinking I will try a riser bar first because the overall balance of the bike is good stock and spending tons on a new Lefty sorta sucks since it's a brand new bike.

However on my wifes 2010 Scalpel 100 the move to an Ultra has worked out really well. She's not a racer and having the 2.4 Rocket Ron and the Lefty Ultra makes it that she can hang on the ups and still enjoy the downs.

Yes I like it very much, meaning the 650b. And yes I'm still thinking the Ultra 120 mm Lefty might be nice too. Of course my bike didn't come with the Ultra it came with the Speed and if all I wanted to do was sprint race the thing I'd be happy about that. But I like to do longer rides that sometimes involve big descents and there a little more travel and a little more plush would be a good thing.